The gunk in there can really mess up your consistancy of everything before and after let-off.  Good point, Laura.  It'll also change the dw/uw stuffs...All clean = all good to start with. Paul <table width=100%> <tr valign=top> <td>From: <td>Laura Olsen <laura-olsen@att.net> <tr valign=top> <td>To: <td>pianotech@ptg.org <tr valign=top> <td>Date: <td>09/07/2011 03:07 PM <tr valign=top> <td>Subject: <td>Re: [pianotech] Baldwin grand repetition spings</table> <hr noshade> <tt>If the springs have slots, don't forget to clean them and polish the springs! Laura On Sep 7, 2011, at 7:39 AM, Mike Spalding wrote: > And all the signs point towards heavy hammers:  Replacement hammers carelessly prepped and installed, DW = 65, UW = 35.  But you're right, I would want to see more measurements and analysis  before changing my suspicion to a conclusion <G> > > On 9/7/2011 7:28 AM, Al Guecia/Allied PianoCraft wrote: >> Absolutely Mike, if heavy hammers are indeed the problem. >> >> Al - >> High Point, NC >> >> >> >> On Sep 7, 2011, at 8:01 AM, Mike Spalding wrote: >> >>> On 9/6/2011 3:11 PM, Douglas Gregg wrote: >>>> Back to the issue of the repetition spring. I know that that does not >>>> come into play with measuring down weight but it seems that it could >>>> add to the heavy feel. Has anyone else thought about this design that >>>> Baldwin uses. It seems to add a lot of pressure on the back of the >>>> jack to keep the repetition lever loaded. >>>> >>>> Thanks >>>> Doug Gregg >>>> Classic Piano Doc >>> Doug, >>> >>> I suspect the reason you are sensing a lot of spring force on the jack is that it has to be set very strong for the rep lever to support the heavy hammers.  If you were to replace the hammers with ones that gave you a down weight in the 50 gram range, and regulated the rep springs appropriately, the jack spring would feel right. >>> >>> Mike >>> >>> >> > </tt>